Water treatment
Ultrafiltration water-treatment systems
Ultrafiltration and nanofiltration membrane systems that remove suspended solids, colloids, bacteria and, in the case of NF, part of the dissolved hardness, for RO pre-treatment, process water and water reuse.
Overview
Ultrafiltration uses hollow-fibre or flat-sheet membranes with pores in the 0.01–0.1 micron range to separate particles, colloids and microorganisms while letting dissolved minerals pass. Nanofiltration membranes are tighter and also reject a share of divalent salts. Both run as pressure-driven, modular systems with backwash and clean-in-place routines and can be fitted with flux and differential-pressure monitoring and membrane integrity testing.
Membranes are made from polymers such as PVDF, PES or PAN. Modules can be supplied in custom sizes for plant builders as well as within complete skids.
Selecting UF or NF
UF is chosen when the aim is solids and microbial removal without changing mineral content, for example ahead of RO or for reuse. NF suits partial softening or colour removal at lower pressure than RO. Selection depends on feed turbidity, organics and temperature, the required product quality, membrane chemistry compatibility with cleaning chemicals, and the backwash and CIP arrangement.
Range overview
- Types and variants
- Ultrafiltration (UF) System
- Nanofiltration (NF) System
- 250 LPH UF Plant
- 500 LPH UF System
- 1000 LPH UF System
- Hollow-Fibre UF Membrane
- Flat-Sheet UF Membrane
- Custom Membrane Modules
- Materials and grades
- PVDF
- PES
- PAN
- Size range
- 250, 500 and 1000 LPH Plants
- UF Membrane Flow 500–10,000 LPH
- UF Pore Size 0.01–0.1 Micron
- NF Pore Size 0.001–0.01 Micron
- Pressure / temperature
- UF Membrane Operating Pressure 1–5 bar
- NF Operating Pressure 50–150 psi
- Features
- Backwash and CIP
- Modular Construction
- Flux and Differential-Pressure Monitoring
- Membrane Integrity Testing
Exact specifications depend on the variant, material and size. Confirm ratings and certification against the datasheet or with our engineers before ordering.
Applications
- RO Pre-Treatment
- Potable Water
- Wastewater and Greywater Reuse
- Juice and Dairy Processing
- Textile Dye Recovery
- Pharmaceutical Water
- Boiler Feed Softening (NF)
Industries
- Food and beverage
- Dairy
- Pharmaceutical
- Chemical
- Textiles
- Municipal
Information that speeds up a quotation
Share what you know. Anything you are unsure of can be marked “not known” — our engineers will help confirm it.
- Feed source
- Flow
- Inlet analysis
- Outlet target
- Recovery
- Site
- Power
- Disposal
- OPEX
Need a datasheet?
Add this family to your enquiry list and mention the variant — we will send the relevant technical documents.
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Frequently asked questions
Why use UF ahead of an RO plant?
UF removes suspended solids, colloids and microorganisms that would otherwise foul RO membranes, giving the RO a more consistent feed. This is particularly useful where feed water quality varies, such as surface water or treated effluent being recycled. The benefit for a given site depends on the feed and should be assessed from a water analysis.
What do you need to specify a UF or NF system?
Send the feed source and analysis (turbidity, SDI if available, TOC or COD, hardness, temperature), the required product flow and quality, and the downstream use. Mention the cleaning chemicals you plan to use, any space limits, and whether you need complete skids or replacement membrane modules only.
Ready to specify ultrafiltration water-treatment systems?
Send the details you have — quantities, sizes, drawings or a part number. Unknowns are fine.